Knight Kiln

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Knight Kiln
Knight kiln.jpg
Owner/Loaner RMM
Serial Number 12674382
Make/Model 103
Arrival Date 2015-10-08
Usable yes
Contact Katie
Where Ceramics Lab
Certification Needed yes
Hackable yes
Estimated Value $400


Knight Kiln http://wiki.redmountainmakers.org/wiki/Knight_Kiln


Controller

This kiln is controlled by a homemade controller. For more information about this system, see Project:Kiln_Automation.

References

Manuals

Consumables

  • clay
  • heating coils

This tool requires certification for use.

Origin

Space One Eleven.

List of Currently Certified Users

Qualified Member Trained By
Katie Kansai Gaidai University
James James
Daniel Daniel

Past project info

Materials and parts

The original Nichrome wire all seemed fine, with a resistance of around 20 Ohms per coil. Each section has 2 coils, so each section draws ~2 * 9.6A, let's say 20A.

The original between-section connectors were shot (original connectors were spec'd for 20A, which is way too close to the power actually pulled, they are all corroded, and they are not the locking type).

The connectors needed are NEMA L6-30 (or L7-30 / L8-30, but those offer nothing to the kiln and are generally more expensive). We need two male and two female - they run around $10-$20 for each on amazon, so expect $60 total. Ebay has some cheaper ones.

Example pair (we need 2 of each): http://www.amazon.com/gp/product/B000FPAN7A http://www.amazon.com/gp/product/B001735W34

TODO Presumably these connections have already been re-done, or modified.

At least one of the switches for controlling strength of each section is broken too. We can replace them with 4 position / 12 terminal rotary switches that handle at least 15A 240VAC per contact. They're around $8 each off amazon; I didn't check other places. (This feature is not currently supported)

Example: http://www.amazon.com/dp/B00Y1YVUF0/

We need to examine some of the other parts as well, it looks like the timer mechanism may need repair, and maybe the sitter mechanism as well. (These features are not currently supported)

We'll also need wire, preferably stranded copper, that can handle 15A and wire that can handle 25A (or just use all wire that can handle 25A). (This is done)

here is the kiln manufacturer's website: http://www.seattlepotterysupply.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=sps_ecat&Category_Code=EC1

they have repair parts.

Here is a link to the cone supports we need that are missing from the tune assembly for the kiln sitter: http://www.axner.com/kiln-sitter-cone-supports-set-of-2.aspx